The annual event, often called “Russian Davos,” drew thousands of participants from over 130 countries for business deals, global economic talks, and high-level dialogue, with Putin delivering a key address. Residents posted images and video on Telegram showing smoke near the Kronstadt Marine Plant, a naval shipyard about 30 km west of central St. Petersburg. Local transport officials briefly halted entry and exit from Kronstadt after the incident. Russia’s Defence Ministry said air defences shot down 376 drones overnight, including more than 140 over the Leningrad region around St. Petersburg. Ukraine has intensified its long-range drone campaign against Russian oil infrastructure in recent weeks. Strikes hit multiple refineries and export terminals. Kyiv aims to curb Russia's war funding, with nearly 40% of refining capacity reportedly offline as of May.